Hardware vs. Software basics.

Correct answer: A. It can connect with hardware services at a deeper operating system level

A kernel module can connect with the core system and help control hardware. For exams treat it as more sensitive than a normal app.

Correct answer: A. Low level control instructions inside the processor

Microcode relates to how instructions are implemented inside a processor. For exams do not treat it as normal application software.

Correct answer: A. To improve processor behavior or security

A microcode update can provide improvements at processor level. For exams connect it with internal hardware control.

Correct answer: A. It can run directly on hardware

A type one hypervisor can run directly on hardware without a host operating system. For exams connect it with bare metal hypervisor.

Correct answer: A. Host operating system

A type two hypervisor runs on top of a host operating system. For exams remember the placement of both hypervisor types.

Correct answer: A. Virtual hardware presented by software

A virtual network card is not a separate real card but a device shown by software. For exams separate virtual and physical items.

Correct answer: A. Emulation imitates another system and virtualization shares real resources

Emulation can imitate while virtualization controls use of real hardware resources. For exams do not treat both terms as the same.

Correct answer: A. To make processes and resources appear isolated

Namespaces can make a container feel like a separate environment. For exams treat containers as software isolation concept.

Correct answer: A. Limiting resource use of processes

Control groups can limit resources like CPU and memory. For exams connect this with software control over hardware resources.

Correct answer: A. To reduce risk and unauthorized access

A sandbox improves security by keeping an app within controlled limits. For exams understand it as a software security model.

Correct answer: A. A system call requests operating system service and a hardware instruction runs at processor level

A system call is communication between application and operating system. For exams separate software service from processor level work.

Correct answer: A. Changing CPU from one process to another

Context switch is used by the operating system to run processes. For exams connect it with multitasking.

Correct answer: A. A thread can be an execution stream within a process

A process is a running program and a thread can be a stream of work inside it. For exams treat both as software execution concepts.

Correct answer: A. A timing based software issue with multiple execution streams sharing a resource

A race condition is related to software coordination. For exams focus on shared resource and timing order.

Correct answer: A. Two or more processes stop while waiting for each other's resources

Deadlock is a software resource management problem. For exams identify the words waiting and resources.

Correct answer: A. To prevent one program from corrupting another program's memory

Memory protection helps system stability and security. For exams connect it with operating system and hardware cooperation.

Correct answer: A. When a needed memory page is not currently in RAM

Direct answer: Option A is correct. A page fault occurs when a program refers to a virtual memory page that is not currently present in main memory, or RAM. The operating system notices this event, finds the required page in secondary storage if available, loads it into a suitable RAM frame, and then allows the instruction to continue. Thus, a page fault is a normal memory-management event; it does not necessarily mean that the computer is permanently damaged. Option A gives exactly the required condition. Option B is wrong because the amount of paper in a printer is unrelated to virtual-memory pages. Option C is wrong because a clean mouse pad affects mouse movement, not RAM contents. Option D is wrong because a blue monitor display does not indicate that a memory page is absent. Exam cue: page fault means “needed page absent from RAM,” not a physical page falling down.

Correct answer: A. System spends too much time in paging or swapping

Thrashing can occur due to low RAM or heavy memory pressure. For exams connect it with slow performance.

Correct answer: A. Software gradually occupies more RAM

A memory leak is a software fault but increases RAM use. For exams distinguish the fault and its effect.

Correct answer: A. To help recovery by recording changes

A journaling file system can reduce damage after sudden shutdown. For exams connect it with storage safety.

Correct answer: A. Information like file name location size and permissions

Metadata helps organize and find a file. For exams understand the difference between data and data about data.

Correct answer: A. Hardware RAID may use a separate controller and software RAID may be managed by operating system

Both can be storage management methods but the place of control differs. For exams identify the role of controller and operating system.

Correct answer: A. Distributing writes evenly across memory cells

Wear leveling is related to internal management of an SSD. For exams connect it with cooperation of storage hardware and firmware.

Correct answer: A. Telling SSD about unused blocks

TRIM helps storage management between operating system and SSD. For exams understand it as software command and hardware response.

Correct answer: A. Number of pending storage requests at a time

Queue depth tells how many requests storage is handling. For exams connect it with performance analysis.